Hi all,
I have a question about a test in the maintenance manual, TM 9-6115-643-24 Section 4.2.1 test B. I will try to add a screen shot. This test is testing for voltage between terminal 19 and 20 on A5. The test states after hooking up the leads...... "then move the master switch to START position, reading should be battery voltage when generator does not crank, if there is no voltage between the terminals positions, the (GCU) A5 is not functioning properly and should be replaced."
My question is, when the S1 master switch is in start position I thought it was cranking? Does it mean after the relay turns off and it is running even though you are holding it in start? What mine does is when you turn to start I have battery voltage at 19 and 20 for a very short time, about 2 seconds then nothing. (even if holding the switch in start) The note does say there will be no voltage there when the unit is running so that makes sense but the statement above from the manual makes no sense to me.
I have a question about a test in the maintenance manual, TM 9-6115-643-24 Section 4.2.1 test B. I will try to add a screen shot. This test is testing for voltage between terminal 19 and 20 on A5. The test states after hooking up the leads...... "then move the master switch to START position, reading should be battery voltage when generator does not crank, if there is no voltage between the terminals positions, the (GCU) A5 is not functioning properly and should be replaced."
My question is, when the S1 master switch is in start position I thought it was cranking? Does it mean after the relay turns off and it is running even though you are holding it in start? What mine does is when you turn to start I have battery voltage at 19 and 20 for a very short time, about 2 seconds then nothing. (even if holding the switch in start) The note does say there will be no voltage there when the unit is running so that makes sense but the statement above from the manual makes no sense to me.
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